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157
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2.5.1 Installation of indoor unit
(1)
Ceiling recessed compact type (FDTC)
(a)
Selection of installation location
1) Select location where the space above ceiling is larger than those mentioned below and perfect draining can be assured.
2) With the customer’s consent, select a location with following suitable conditions.
a) Where cool air or hot air can easily pass through.
If the height of the location exceeds 3 m, hot air will gather in the ceiling. Suggest to the customer to also install a
circulator.
b) Where water can be completely drained. A sloping location for drainage.
c) Where there are no wind disturbances to the suction inlet and blowing outlet, where the fire alarm will not be set off
erroneosly, where no short circuits occur.
d) Where there is no direct sunlight.
e) If the humidity above the ceiling exceeds 80% or the condensation temperature above the ceiling exceeds 28ºC, affix
polyurethane foam (with a thickness to 10 or greater) above the insulation in the ceiling panels.
Carry out tests of the main unit under the above conditions and confirm that there is no failure. However, if the
environment where the unit is installed exceeds the above conditions and the unit is operated in high humidity
conditions, there is danger of water drops dripping down. If there is a possibility that the unit will be used under
such conditions, install 10 to 20 mm of insulation material to the main unit, piping and drain pipes.
3) Consider the supporting strength of the location. If the strength is not sufficient to sustain the unit weight, use reinforcing
materials.
(b)
Installation space for unit
a) When a sufficient interval cannot be secured between the unit and a wall or
another unit, shut up diffusers on that side to block winds and make sure
that no short-circuiting is occurring. (A wind blocking material is avail-
able as an optional part)
• Do not use the unit in the “Lo” wind mode, when winds are blown into two
or three directions.
1000 or more
(mm)
Obstacle
1000 or more
• Installtation space
(
)
A
A
A
144
323
▫
570
137
197
35
93
196
248
185
190
223
321
348
530 Suspension bolts pitch
45 or more
530 Suspension bolts pitch
541
64
200
48
▫
413
▫
700
Lug for
suspension bolts
Control
box
Drain hose piece
Gas piping
Liquid piping
Suspension bolts
Drain
ø6.35 (1/4")
ø12.7 (1/2")
(Accessory)
(Installed at site)
(Connectable with VP25)
(M10 or M8)
Air supply
Air return
grille
Decorative Panel
Opening for
exit wiring
Unit:mm
VIEW A
60
140
100
100
115
140
6-ø4
Holes for
tapping screws
Hole
▫
660(ceiling hole size)
Note (1) In the case of neigh-
boring installations,
separate the units by
the following dimen-
sions or greater.
FDTC151R:4000mm
